Design a solution for sending notifications to Kafka & Rest in apex-pdp policies so that policy authors can use them to trigger notifications at various stages of policy execution.

One possible approach could be:

Add a utility method in APEX executor to send notification messages to DMaaP/Kafka.

The method can then be used in the Task Logic to send notification messages to DMaaP/Kafka.

This avoids the need to create multiple states and policies in APEX  in order for it to communicate with DMaaP/Kafka just to send notification messages. Also this avoids the usage of direct Rest calls in the logic, and also duplicate definitions for the Log Event and Rest endpoint setup.